.yulang-packages-union {
  display: flex;

  .component-menu {
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    width: 15em;
    min-width: 15em;
    height: calc(100vh - 5em - 4em - 1px);
    overflow-y: scroll;
    padding-top: 4em;
  }

  .component-content {
    width: calc(100% - 15em);
    padding-left: 1em;
  }

  .menu-title-level2-common {
    cursor: pointer;
  }

  .menu-title-1 {
    font-weight: 800;
    margin: 1em 0;
    font-size: 1.2em;
  }

  .menu-title-2 {
    margin: 0.6em 0;
    cursor: pointer;
    font-size: 0.8em;
  }

  .menu-title-3 {
    padding: 1em 0;
    cursor: pointer;
    font-size: 0.6em;
    background-color: var(--yulang-theme-color--);
    border-radius: .5rem;
  }

  .menu-title-actived {
    color: var(--yulang-font-color--);
  }
}